SAN FRANCISCO—Six separate collisions involving 19 vehicles on the 101 going southbound injured one person and caused major traffic delays on Tuesday, January 31, at around 7 a.m. 

According to reports, once the initial crash occurred multiple crashes occurred behind it. The person who was injured was transported to San Francisco General Hospital with non-life-threatening injuries. The freeway was cleared of the wreckage by 9 a.m.